I have added a new field to an existing field-group->flexible content->layout. When i put some content in the new field and save the post, the new field’s content is not saved.
When i rename an existing field and put some content inside it is saving perfectly. The Problem only occurs with newly created fields.
I also use WPML-Plugin and when i create a new field in the second language, everything is working fine.
I tried to disable all Plugins(including WPML) except ACF and i used a standard WP-theme, but that did not help at all.